Here you will find information on a
number of subjects, mostly on astronomy (especially my own work), but also on
some historical topics. Parts of the site are still under construction, but will be
completed as soon as possible.
Click on the images on the right side to see what is already
there, and for specific arguments on the left side.

I also have some other things to tell, of which I will give a list below. These
are special arguments that may change at any moment. For the moment there are three topics: